Motion-picttjre-strip-reel alarm



E. W. HULETT. MOTION PICTURE STRIPREEL ALARM.

APPLICATION FILED JUNE 10, 1918.

- \DE' :5 VIEW ,4 f/

INVENTOR.

PATENT orrIcE.

' EVERETT w. HULET'I', or CHICAGO, ILLINOIS.

MOTION- PICTURE-STRIP-REEL ALARM.

Specification of Letters Patent.

Patented Dec. 2, 1919.

, Application filed June 10, 1918. Serial No. 239,172.

To all whom it may concern:

Be it known that I, EVERETT W. Human,

a citizen of'the United. States, residing at Chicago, in thecountyof'Cook and State of Illinois, have invented certain new and usefulImprovements in Motion-Plcture-strip- Reel Alarms, of whichthe followingis a specification. y

This invention relates to improvements in alarms and it is the principalobject of the invention to provide an alarm for use 1n con-DBOtlOll'Wlth motion picture strip reels which when the reel is emptywill be automatically operated, thus signaling the operator and allowinghim sufficient time to stop the projecting apparatus.

Another and equally important object of the invention is to provide asignal which can be adjusted to operate at predetermlned periodsdepending upon the amount of film strips arranged on the reel.

The improvements in the details and arrangement of parts will beapparent from an inspection of the accompanying drawing, in connectionwith the specific descrlptlon hereinafter contained, and wherein thepreferred embodiment of the invention is disclosed for the purpose ofimparting a full understanding of the same.

In the drawings:

Figure 1 is a fragmentary side elevation of a reel magazine or housinghaving part thereof broken away showing the arrangement of the improvedalarm with relation to the reel therein,

F 2 is a side elevation of the improved alarm, and

Fig. 3 is an end view thereof.

Having more particular reference to the drawings, in connection withwhich like reference characters will designate corresponding partsthroughout the several V1.GWS,'1 represents the magazine or reel houslngin which the picture strip receiving reel 2 is rota-tably mounted;

Engaged with the outer side of the maga- -zine l is an arm 3 having itslower end apertured to permit the insertion of one end iof a bolt 4therein, the remaining end of said bolt carryinga bell 5. As will benoted, the upper end of the arm 3 is also apertured and receives abearing sleeve 6 therethrough, one portion of which is screw threaded asat 7 while the remaining portion carries a bearing element 8 adapted tobe engaged with one side of the reel magazine 1 in orderthat said armcan be effectually secured thereto upon the turning of the bearingsleeve 6. A set-screw9 is also engaged .With the upper end of the arm 3and is adapted to be turned into engagement with an adjacent portion ofthe side wall of the magazine 1 for an obvious purpose.

Rotatably received in the bearing sleeve 6 is the right angularlydisposed portion of a curved trip arm 10, the body portion of said armbeing telescopically engaged with a hollow curved trip arm 11 which isslotted as at 12 to permit the passage of a lock-screw 13 therein, saidlock-screw, of course, being adapted for engagementwith suitably formedscrew threaded openings in the adjacent portion of the trip arm 10. Inthis way, it is obvious that the hollow trip arm 11 will be secured inadjusted position with relation to the body portion of the trip arm 10,thus, allowing the same to be made of various lengths, such asconditions.

or preference may dictate. The outer end of the arm 11 is bifurcated androtatably receives a roller 14 therebetween, which roller is adapted forengagement with the picture strip arranged about the core of the reel 2,said roller being formed of material which will not scratch or otherwiseinjure the picture strip.

Engaged with the outer end of the right angularly disposed portion ofthe trip arm 10 is a spring arm 15 carrying a hammer 16 on its lowerend, which hammer is adapted to be engaged with the bell 5, at times.

Inoperation, the arm 11 is properly adjusted with relation to the arm 10whereupon the roller 1 carried thereby is engaged with the picture striparranged about the reel 2. As the reel 2 is rotated to feed the picturestrip therefrom, the trip arms 10 and 11 will be allowed to graduallydescend until a suflicient quantity of film strip has been removedtherefrom to permit the passage of the roller 14 thereby. At this time,the trip arms will fall abruptly downwardly thus causing the hammer 16to impart a sharp blow to the bell 5, ringing the same and signaling theoperator of the condition of the reel and as a consequence, allowing himsuflicient time to stop or otherwise regulate the projecting apparatus.As

hereinbefore stated, by adjusting the telescopically engaged trip arms10 and 11, the

alarm can be actuated at predetermined periods depending of course uponthe amount of film strip arranged about the reel 2.

Manifestly, the construction shown is capable of considerablemodification and such modification as is within the scope of my claims,I consider Within the spirit of my invention.

I claim:

1. The combination with a reel housing, of a bracket fitting against theouter face of one Wall thereof and provided with a threaded openingregistering with an opening formed in the wall, a signal bell carried bysaid bracket, a bearing sleeve extending through the housing wall fromthe inner side thereof and having a threaded end portion passing throughthe threaded opening of the bracket, an abutment collar carried by thesleeve and engaging the inner face of the Wall, an arm for engaging areel in the housing having one end portion provided with an extensionforming a pivot pin passing through the sleeve, and a striker connectedwith the outer end portion of the pivot pin for striking the signal bellwhen the arm moves downwardly.

2. Analarm for motion picture strip reels including a bell supported inproximity to the reel, telescopically engaged trip arms pivotallymounted adjacent saidgbelh one end of one of said arms being-bent atsubstantially right angles, a hammer engaged with the rightangularlybent portion of the trip arm engageable with said bell, meansfor locking the telescopically engaged trip arms in adjusted position,and a roller mounted in bearing in the outer end of one of the trip armsengageable with the picture strip on said reel.

In testimony whereof I afiix my signature hereto.

EVERETT W. HULETT.

